It all started with a TSR-80 in the late 80s. At that point it was more a toy than anything else. Since then, my interest in computers materialized with a PS/2 80 while I was in university in Mexico. Before I graduated I already had a couple of Macs, an LC-II and a Centris 660 AV, which was the catalyst to becoming an expert in both QuickTime and using the Mac. During my MBA, and later while attending the Vancouver Film School (VFS), I really learned to learn. Being a professional student at that point I started in the teaching realm as a Teaching Assistant, moving quickly to a part-time instructor position at VFS and soon after a full time position. Also while teaching, I've held a number of managerial positions for web development companies like Blastradius, Donat Group Inc. and later Rouxbe.com as well as working as a freelance consultant, mostly related to digital video deployment. My first tutorial for MPV was made soon afer the company started. Since then I've made a number of tutorials ranging from using OS X to advanced video compression techniques with Compressor and Adobe Media Encoder. Today I teach part time at the Art Institute of Vancouver, create courses for MPV and am always open for business as a freelancer.

From what I'm understanding the Mac is just not booting up, right? Try rebooting and holding Cmd+R. This should force the Mac to boot from the Restore Partition that Lion created when you upgraded/installed. If your Mac was sold after Lion shipped, it also should try to go online if the restore partition does not work or load.

Take a look at this tech note from Apple:
http://support.apple.com/kb/HT4718